[INFO] cloning repository https://github.com/AnthonyDest/Rust-Flamegraph-Profiler
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/AnthonyDest/Rust-Flamegraph-Profiler" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAnthonyDest%2FRust-Flamegraph-Profiler", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAnthonyDest%2FRust-Flamegraph-Profiler'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 53ff2b3ae951d7a8f5bbd7528a05d933e2dd5de4
[INFO] checking AnthonyDest/Rust-Flamegraph-Profiler against master#3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0 for pr-143164
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAnthonyDest%2FRust-Flamegraph-Profiler" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/AnthonyDest/Rust-Flamegraph-Profiler
[INFO] finished tweaking git repo https://github.com/AnthonyDest/Rust-Flamegraph-Profiler
[INFO] tweaked toml for git repo https://github.com/AnthonyDest/Rust-Flamegraph-Profiler written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/AnthonyDest/Rust-Flamegraph-Profiler on toolchain 3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/AnthonyDest/Rust-Flamegraph-Profiler already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b742068d884fa42d2c6aefb4c837d1f8d382f34e8a385fe230b75e2d0de0a17a
[INFO] running `Command { std: "docker" "start" "-a" "b742068d884fa42d2c6aefb4c837d1f8d382f34e8a385fe230b75e2d0de0a17a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b742068d884fa42d2c6aefb4c837d1f8d382f34e8a385fe230b75e2d0de0a17a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b742068d884fa42d2c6aefb4c837d1f8d382f34e8a385fe230b75e2d0de0a17a", kill_on_drop: false }`
[INFO] [stdout] b742068d884fa42d2c6aefb4c837d1f8d382f34e8a385fe230b75e2d0de0a17a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7c51f362ac545b024beb94d448b1a8127ed1837bc7f73795ba9123b1dea777ef
[INFO] running `Command { std: "docker" "start" "-a" "7c51f362ac545b024beb94d448b1a8127ed1837bc7f73795ba9123b1dea777ef", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking cpuid-bool v0.1.2
[INFO] [stderr]     Checking hex v0.4.2
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling memoffset v0.5.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking crossbeam-channel v0.4.3
[INFO] [stderr]     Checking crossbeam-queue v0.2.3
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking crossbeam v0.7.3
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]     Checking sha2 v0.9.1
[INFO] [stderr]     Checking lab4 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `super::Event`
[INFO] [stdout]  --> src/idea.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use super::Event;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]  --> src/idea.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::fs;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::Event`
[INFO] [stdout]  --> src/package.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use super::Event;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]  --> src/package.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::fs;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Event`
[INFO] [stdout]  --> src/student.rs:1:63
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::{checksum::Checksum, idea::Idea, package::Package, Event};
[INFO] [stdout]   |                                                               ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Sender`
[INFO] [stdout]  --> src/student.rs:2:36
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crossbeam::channel::{Receiver, Sender};
[INFO] [stdout]   |                                    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Write` and `stdout`
[INFO] [stdout]  --> src/student.rs:3:15
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::{stdout, Write};
[INFO] [stdout]   |               ^^^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::Event`
[INFO] [stdout]  --> src/idea.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use super::Event;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]  --> src/idea.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::fs;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::Event`
[INFO] [stdout]  --> src/package.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use super::Event;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]  --> src/package.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::fs;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Event`
[INFO] [stdout]  --> src/student.rs:1:63
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::{checksum::Checksum, idea::Idea, package::Package, Event};
[INFO] [stdout]   |                                                               ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Sender`
[INFO] [stdout]  --> src/student.rs:2:36
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crossbeam::channel::{Receiver, Sender};
[INFO] [stdout]   |                                    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Write` and `stdout`
[INFO] [stdout]  --> src/student.rs:3:15
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::{stdout, Write};
[INFO] [stdout]   |               ^^^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id`, `skipped_idea`, and `idea_queue` are never read
[INFO] [stdout]   --> src/student.rs:7:5
[INFO] [stdout]    |
[INFO] [stdout] 6  | pub struct Student {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] 7  |     id: usize,
[INFO] [stdout]    |     ^^
[INFO] [stdout] ...
[INFO] [stdout] 10 |     skipped_idea: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 14 |     idea_queue: Vec<Idea>,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `id`, `skipped_idea`, and `idea_queue` are never read
[INFO] [stdout]   --> src/student.rs:7:5
[INFO] [stdout]    |
[INFO] [stdout] 6  | pub struct Student {
[INFO] [stdout]    |            ------- fields in this struct
[INFO] [stdout] 7  |     id: usize,
[INFO] [stdout]    |     ^^
[INFO] [stdout] ...
[INFO] [stdout] 10 |     skipped_idea: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 14 |     idea_queue: Vec<Idea>,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Event`
[INFO] [stdout]  --> src/main.rs:6:92
[INFO] [stdout]   |
[INFO] [stdout] 6 |     checksum::Checksum, idea::IdeaGenerator, package::PackageDownloader, student::Student, Event,
[INFO] [stdout]   |                                                                                            ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Event`
[INFO] [stdout]  --> src/main.rs:6:92
[INFO] [stdout]   |
[INFO] [stdout] 6 |     checksum::Checksum, idea::IdeaGenerator, package::PackageDownloader, student::Student, Event,
[INFO] [stdout]   |                                                                                            ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.08s
[INFO] running `Command { std: "docker" "inspect" "7c51f362ac545b024beb94d448b1a8127ed1837bc7f73795ba9123b1dea777ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c51f362ac545b024beb94d448b1a8127ed1837bc7f73795ba9123b1dea777ef", kill_on_drop: false }`
[INFO] [stdout] 7c51f362ac545b024beb94d448b1a8127ed1837bc7f73795ba9123b1dea777ef
